Toroidal coil winding machine



2 Shegets-Sheet l J. ONISKQ, JR

TOROIDAL con. WINDING MACHINE OriginalFiled Oct; 10. p52

July 14, 1959 BY- 1 .44 M

AT'TOR N'E-YS July 14, 1959 J. ONISKO, JR

TOROIDAL con WINDING MACHINE 2 Sheets-Sheet 2 INVENTOR. JOHN ONISKO JR. BY QQ 9- --(1Q4A -ZQ ATTORNEYS United States Patent 2,894,699 TOROIDAL COIL WINDING MACHINE John Onisko, Jr., China Lake, Calif.

Continuation of application Serial No. 314,237, October .10, 1952. This application February 16, 1956, Serial .No. 566,051

6 Claims. (Cl. 242-4) (Granted under Title 35, U.S. Code (1952), sec. 266) The invention described herein may be manufactured and used by or for the Government of the United States of America for governmental purposes without the payment of any royalties thereon or therefor.

This invention, a continuation of U.S. patent application Serial No. 314,237, filed October 10, 1952, and now abandoned, relates to coil winding apparatus and more particularly to improvements in apparatus of the type adapted to wind a plurality of coils of wire on a closed loop shaped core.

One of the objects of the invention is to provide coil winding apparatus of the type which employs an annular bobbin which rotates through the space within a closed core and wherein the bobbin rotates in the same direction while a wire supply is fed thereto and when the wire supply on the bobbin is fed to the core.

Another object is to provide a bobbin which does not require any tensioning apparatus carried therewith to control pay-01f of wire therefrom.

Another object is to pay 01f wire from the bobbin by kinking the wire in a novel manner as it pays off therefrom.

Other objects are to provide novel apparatus for tensioning the wire on the core.

Further objects and many of the attendant advantages of this invention will be readily appreciated as the same become better understood by reference to the following detailed description when considered in connection with the acompanying drawings wherein:

Fig. l is a section taken on line 11, Fig. 3;

Fig. 2 is an enlarged section of the portion of Fig. 1 indicated by arrow 2;

Fig. 3 is a side elevation of Fig. 1, as the latter would appear in its entirety, as viewed in the direction of arrow 3, portions being broken away;

Figs. 4, 4A, 4B, 4C, and 4D illustrate various positions of the rotatable bobbin during formation of a coil of wire on the core;

Fig. 5 is a fragmentary side elevation, similar to Fig. 3, illustrating an alternative formof tensioning device; and;

Fig. 6 is an enlarged section taken on line 66, Fig. 5.

Referring in detail to the drawing and particularly Figs. 1 to 3, the subject of the invention comprises a frame formed of a horizontal base plate 10 and a vertical plate 12 rigidly secured together in any desired manner. An arm 14 is pivotally connected at its lower end to a pivot pin 16, afiixed to plate 12, the upper end of the arm rotatably supporting a shaft 18 having a grooved roller 20 at one end thereof and a pulley 22 at its other end. A variable speed motor 24 is secured to plate 10, its driving shaft 26 being disposed in axial alignment with pivot pin 16, this shaft having a pulley 28 thereon connected to pulley 22 by belt 30. A tension spring 32 is secured at one end to the arm and at the other end to the frame to urge the arm in a clockwise direction in Fig. 3. Grooved rollers 34, 36 are aifixed to shafts 38, 40, respectively, similar to shaft 18,'and rotatably supported by plate 12 about parallel axes fixed relative to the latter. A channel shaped outwardly open annular bobbin 42, having a bight portion 44 and side flanges 46, 48 is supported for rotation by rollers 20, 34 and 36, flange 46 engaging the grooves in the rollers and constraining the bobbin to rotate in a fixed vertical plane. Switch 50 controls operation of the motor and rheostat 52 controls the speed thereof.

A wire guide plate 54 is rigidly secured to plate 12 by a stud 56 secured to plate 54 having a ball face nut 58 thereon engaging plate 12. A plurality of screws 60, 60a, 60b, 60c threadedly engage plate 12, ends thereof engaging plate 54. It will be apparent that by suitable adjustment of these screws and tightening of nut '58, plate 54 may be disposed in a desired fixed position relative to the frame. A second guide plate 62, provided with a rigid base 64, is disposed in parallel relation to plate 54, base 64 slideably engaging plate 10 in a dovetail machine guide 66. Screws 68, 68a, extending through elongated slots 70, 70a, respectively, threadedly engage base 10 retaining plate 62 in a desired-position of adjustment. A stop screw 72, threadedly engaging plate 62, its inner end abutting plate 12, provides means for adjusting the position of plate 62 relative to plate 54 and for accurately returning it to such position after it has 7 been removed from base 10.

Plate 62 is provided with an 'arcuate groove 74 which receives a pressures pad 76, this pad comprising an armate metal strip 78, such as brass, secured, such as by cement, to an arcuate strip of resilient material, such as sponge rubber, vidual metal segments 82 similarly secured thereto. Each of the latter segments is provided with an adjusting screw 84, the inner end of which engages a segment. As best shown in Fig. 2, each screw is provided with a projection 86 which engages in an aperture in a segment which prevents rotation of the pad in groove 74. It will be apparent that the pressure exerted by the pad may be varied at angular points therealong which will vary the urge of strip 78 against the outer face of flange 48 of joint is then closed forming an endless annular bobbin.

With plate 62 removed from the machine the bobbin is applied to the grooves in rollers 20, 34, 36 by moving arm 14 counterclockwise (Fig. 3) and releasing same so that roller 20 resiliently and drivingly engages flange 46 of the bobbin. The free end of a supply of wire on a spool is then secured within the channel of the bobbin in any manner understood in the art and the bobbin rotated by motor 24 in the direction of arrow 98 until a suitable supply of wire has been formed on the bobbin, after which the wire is cut from its supply. The now exposed other free end of the bobbin supply wire is secured to the core, the latter being disposed on table 100, vertically adjustably supported by base plate 10. Figs. 4, 4A, 4B, 4C, 4D diagrammatically illustrate the sequence of operation in the formation of a complete coil around the core. In the position shown in Fig. 4, kink 102, which is generally 2 shaped, as best shown in Fig. 2, is bodily carried with the bobbin, that is, there is no relative angular motion between the bobbin and the kink. Between the positions shown in Figs. 4 and 4A a loose the latter having a plurality of indipad 88 is disposed substantially Q loop 104 is formed between plates 54 and 62. Fig. 4B shows the shape of this loop after about 90 further rotation. Between the positions of Figs. 4 and 4B a lower portion of the loop is engaged by tension pad 88. When the bobbin moves from the position of Fig. 413 to that of Fig. 4C, a portion of the wire crossing the flange 48 of th bobbin near kink 102 is brought into frictional sliding engagement with strip 78 (see Fig. 2) of pressure pad 76. The drag produced between this portion and the bobbin retains this portion bodily movable with the bobbin, rather than stripping freely from same, and causes the lower portion of loop 104 to be pulled out of engagement with pad 88, a new loop now being almost closed about the core C. When the bobbin moves from the position of Fig. 4C to 4D the wire again engages pad 88 and there is now tension in the wire, since it must pay off over the edge of the bobbin until the latter against reaches a position slightly before that shown in Fig. 4, that is, a position approximately diametrically opposite the core. During this pay-off the drag of the wire between strip 78 and flange 48 of the bobbin controls the pay-ofl of the wire from the bobbin to the precise amount required to complete a finished loop about the core and also tensions the wire between the bobbin and the core. A new Z kink 162 is also formed in the wire as it advances along the bobbin during this tension period.

In the construction so far described pad 76 engages the face of flange 48 of the bobbin. In Figs. 5 and 6 an alternative form of pad construction is illustrated wherein an arcuate pad 17 6, carried in an arcuate groove 174- in plate 162 engages plate 154 rather than the bobbin, the pad being resiliently urged thereagainst by springs 190, carried by screws 192 in brackets 194. The lower end of the pad where the wire first engages same (approximately in the position of Fig. 4C) is provided with a gradual taper or chamfer 176a to obviate a sudden tension shock on the wire.

In either of the constructions descirbed a pair of guide fingers 106, 106a may be provided, secured respectively, to plates 54, 62, and between which a coil may be guided onto the core.

Obviously many modifications and variations of the present invention are possible in the light of the above teachings. it is therefore to be understood that within the scope of the appended claims the invention may be practiced otherwise than as specifically described.

What is claimed is:

1. The method of winding a flexible member, such as a wire or the like, about a closed loop member, such as a toroidal core in a plurality of continuous coils with each coil extending transversely of the loop member, comprising the steps of forming a circular supply of the flexible member passing through the aperture of the loop member and rotating said supply in a certain direction until a desired annular amount of the supply is formed, linking the free end of said flexible member to said closed loop member and rotating said supply in said certain direction, and effecting a running kink in a portion of said flexible member extending between said supply and said loop member during the period the flexible member is being payed off from said annular supply, and locking said kink to said supply during a non-pay-ofi portion of its revolution.

2. Core winding apparatus having a rotatably supported annular bobbin having a bottom wall and spaced side walls forming an outwardly open channel, one of said side walls being a pay-ofi side wall, said channel adapted to contain a plurality of turns of deformable filament, such as wire, a pair of juxtaposed members defining a disc shaped wire guide space therebetween, said space being disposed within the inner diameter of said bobbin and joining an annular gap inside said bottom wall, and a pressure device having an arcuate face resiliently engaging said wire, the construction and arrangement being such that said wire is adapted to pay out from the channel of said bobbin, thence around the outer edge of said pay-off side wall, thence inwardly across the outer face of said pay-off side wall in engagement with the latter and thence be kinked around the inner corner joining said pay-off side wall and said bottom wall and into said gap, thence pay from said gap into said wire guide space to a core on which it is wound.

3. Apparatus in accordance with claim 2 wherein said pressure device engages the outside face of said pay-off side wall.

4. Apparatus in accordance with claim 2 wherein said pressure device engages said wire at points where it pays into said disc shaped space.

5. Core winding apparatus having a rotatably supported annular bobbin having a bottom wall and spaced side walls forming an outwardly open channel, one of said side walls being a pay-oft side wall, said channel adapted to contain a plurality of turns of deformable filament, such as wire, a pair of juxtaposed members defining a disc shaped wire guide space therebetween, said space being disposed within the inner diameter of said bobbin and joining an annular gap inside said bottom wall, and a pressure device having an arcuate face resiliently engaging an outside face of said pay-off side wall, the construction and arrangement being such that said wire is adapted to pay out from the channel of the bobbin, thence around the outer edge of said pay-oft side wall, thence inwardly across the outside face of said pay-off side wall and in engagement with the latter and with said arcuate face, and thence be kinked around an inner corner joining said pay-off side wall and said bottom wall and into said gap, and thence pay from said gap into said wire guide space to a core on which it is wound.

6. Apparatus in accordance with claim 5 wherein said pressure device includes means for selectively adjusting the resilient pressure of said arcuate face along its length and against said pay-off side wall, whereby its pressure on the Wire may be varied at different angular positions of pay-off as the bobbin rotates.

References Cited in the file of this patent UNITED STATES PATENTS 751,816 Strong Feb 9, 1984 2,192,694 Quinlan Mar. 5, 1940 2,326,969 Quinlan Aug. 17, 1943 2,367,489 Dowd Jan. 16, 1945 FOREIGN PATENTS 738,125 Great Britain Oct. 5, 1955 

